Why use feedback? Reducing effects of nonidealities Reducing Sensitivity to Uncertainties and variability Stabilizing Unstable Systems Reducing Effects of Disturbances Tracking Shaping system response Characteristics(bandwidth/speed
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Inverse laplace transforms Laplace Transform Properties The System Function of an Lti System Geometric Evaluation of laplace Transforms and Frequency responses
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Properties of ct Rational system functions a) However, if H(s)is rational, then The system is causal The roc of H(s) is to the right of the rightmost pole
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Motivation for the Laplace transform CT Fourier transform enables us to do a lot of things, e. g Analyze frequency response of lTi systems Sampling Modulation Why do we need yet another transform? One view of Laplace Transform is as an extension of the Fourier
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1.aM with an Arbitrary Periodic Carrier 2. Pulse Train Carrier and Time-Division Multiplexing 3. Sinusoidal Frequency modulation 4. DT Sinusoidal am 5. DT Sampling, Decimation,d Interpolation
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then, assuming we choose wM
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More efficient to transmit e&m signals at higher frequencies Transmitting multiple signals through the same medium using different carriers Transmitting through\channels, with limited passbands
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SAMPLING We live in a continuous-time world most of the signals we encounter are CT signals, e.g. x(). How do we convert them into Dt signals x[n? Sampling, taking snap shots of x(t) every Seconds
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Result: Linear phase e simply a rigid shift in time, no distortion Nonlinear phase e distortion as well as shift DT
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1. DTFT Properties and Examples 2. Duality in fs& ft 3. Magnitude/Phase of Transforms and Frequency Responses
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复旦大学:《集成电路工程》教学资源(硕士士学位论文)CMOS宽带可变增益低噪声放大器的设计《电工技术》PPT教学课件(教案讲稿)第10章 控制电机机械工业出版社同名教材:《电子技术基础》配套电子教案(PPT课件)第6章 数字逻辑基础山东农业大学:电工电子实验教学中心(教学大纲)单片机原理与应用长江大学:《信号与系统》课程教学资源(PPT课件)第3章 连续系统的拉普拉斯变换分析 3.4 微分方程的拉氏变换解 3.5 动态电路的拉氏变换分析《Multisim10计算机仿真与设计》课程教学课件(PPT讲稿,完整版,共十三章)《接入网技术》AN复习华中科技大学:《模拟电子技术》教学资源(PPT课件)第四章 反馈放大电路《CMOS模拟系统设计》课程教学课件(讲稿)第05章 电流和电压基准《通信集成电路设计》课程教学课件(PPT讲稿)第六章 常用Verilog语法之四北京交通大学:《电路分析》课程教学资源(课件讲稿)第4章 正弦稳态电路分析










